diff options
| author | John Youn <John.Youn@synopsys.com> | 2017-01-26 11:58:40 -0800 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-04-11 10:58:19 +0300 |
| commit | af771d731b8e31e6c5aced2b1b066edd16106a6f (patch) | |
| tree | abeafe98a8ea0fc7e4e4265e7a8fa120e0d8c9f1 /drivers/usb | |
| parent | 3a932b0f50f4c0782a27a257b7557f8b928299b2 (diff) | |
usb: dwc3: gadget: Fix starting microframe for ISOC
The gadget wants to set the starting microframe for the first ISOC TRB
to 4 microframes in the future, but it does so by multiplying the
dep->interval. This only works if dep->interval = 1. For other intervals
it will put it 4 *intervals* in the future which may be way too much.
Fix so that it always adds just one interval or at least 4 microframes.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 1a90877f8b96..640e4aa5482d 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1184,8 +1184,11 @@ static void __dwc3_gadget_start_isoc(struct dwc3 *dwc, return; } - /* 4 micro frames in the future */ - uf = cur_uf + dep->interval * 4; + /* + * Schedule the first trb for one interval in the future or at + * least 4 microframes. + */ + uf = cur_uf + max_t(u32, 4, dep->interval); __dwc3_gadget_kick_transfer(dep, uf); } |